s = input()
if s[0] == s[1] and s[1] == s[2] and s[1] =='R':
    print('3')
elif (s[0] == s[1] or s[1] == s[2]) and s[1]=='R':
    print('2')
elif s[0] == 'R' or s[1] =='R' or s[2] == 'R':
    print('1')
else:
    print('0') s = input() s input() input if s[0] == s[1] and s[1] == s[2] and s[1] =='R':
    print('3')
elif (s[0] == s[1] or s[1] == s[2]) and s[1]=='R':
    print('2')
elif s[0] == 'R' or s[1] =='R' or s[2] == 'R':
    print('1')
else:
    print('0') s[0] == s[1] and s[1] == s[2] and s[1] =='R' s[0] == s[1] and s[1] == s[2] s[0] == s[1] s[0] s 0 s[1] s 1 s[1] == s[2] s[1] s 1 s[2] s 2 s[1] =='R' s[1] s 1 'R' print('3') print '3' elif (s[0] == s[1] or s[1] == s[2]) and s[1]=='R':
    print('2') (s[0] == s[1] or s[1] == s[2]) and s[1]=='R' s[0] == s[1] or s[1] == s[2] s[0] == s[1] s[0] s 0 s[1] s 1 s[1] == s[2] s[1] s 1 s[2] s 2 s[1]=='R' s[1] s 1 'R' print('2') print '2' elif s[0] == 'R' or s[1] =='R' or s[2] == 'R':
    print('1') s[0] == 'R' or s[1] =='R' or s[2] == 'R' s[0] == 'R' or s[1] =='R' s[0] == 'R' s[0] s 0 'R' s[1] =='R' s[1] s 1 'R' s[2] == 'R' s[2] s 2 'R' print('1') print '1' print('0') print '0' s = input() input() s
s = input()
if s[0] == s[1] and s[1] == s[2] and s[1] =='R':
    print('3')
elif (s[0] == s[1] or s[1] == s[2]) and s[1]=='R':
    print('2')
elif s[0] == 'R' or s[1] =='R' or s[2] == 'R':
    print('1')
else:
    print('0')